Yami and Yuu have more chemistry in 2 chapters than the entire arc of Hikari tbh. Hikari is so bland I literally forgot what is special about her aside from the Osananajimi stereotype.
It looks that way because they speedran their romance arc, something Hikari hasn’t gotten yet. Hikari and Yuu are clearly very comfortable with each other (HUGE in a stable relationship), she’s a sweet girl who brings out the better sides of Yuu. She genuinely cares for the people around her and is motivated. She’s a bit airheaded, easily flustered and a little immature but that has been shown to bring out the best even in a misanthrope like Yami.
In contrast Yami is fickle, self-centered, and has been shown to frequently make Yuu feel nervous that she’ll leave or is being insincere. When he finally seems to get comfortable she yanks the ground out from under him to throw herself a pity party. Yami’s strong points are… she’s clever? That’s really it. She gets what she wants when she isn’t busy self-destructing but even her “selfless” actions are motivated out of self-sabotage rather than actually wanting to help.
Hikari seems “dull” because her competition is a walking wall of red flags. Yes Yuu has a complex about not being able to measure up to Hikari, but Hikari’s response wasn’t to say, hard Ghost him so she could “set him free” because she doesn’t think she deserves him.
Tl;dr Hikari seems dull because she’s a positive force in peoples lives which is less interesting than Yami the emotional vampire.
